Box office sales are higher for Hollywood when a Democrat is president, according to Nielsen Wire, a market analysis company.

From 1980 to 2007, box office sales grew by 2.8%, on average, during Democratic administrations, while average sales growth under Republican administrations was just 1%, according to research released Monday by Nielsen PreView.

Overall, in the past three decades, movie sales have grown almost three times faster during Democratic administrations than during GOP administrations, according to Nielsen.

Does this mean audiences had more money to spend during Democratic administrations? Or that people escaped to the movies more often then? Or are these numbers just coincidence?